PAC1921 datasheet(28/56 Pages) MICROCHIP

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PAC1921 High-Side Current/Power Sensor Evaluation Board User’s Guide

DS50002376A-page 28

 2015 Microchip Technology Inc.

When the evaluation board is connected or disconnected, a message displays as

shown in Figure 4-2. With the evaluation board connected, click Auto-detect Address

to restart communications.

FIGURE 4-2:

Communications Failure Message.

4.1.1

Tips for Using the Evaluation Board GUI

• After a power-up of the evaluation board, the default settings are loaded. Users

can save the setting configurations to user-named files, which can be reloaded at

any time for quick reconfiguration (see Section 4.3.3.1 “Configuration Save and

Load”).

• To configure the GUI and PAC1921 for free-run integration power measurement,

press the <F2> function key on the keyboard.

• To reload the PAC1921 register defaults, press the <F6> function key on the

keyboard.

• When using the GUI, the PAC1921 can enter a Sleep state; however, it wakes to

service the GUI SMBus communications, then returns to Sleep. For this reason,

the current consumption will be slightly higher than expected in Sleep state when

using the GUI.

• When the PAC1921 enters Sleep state, the PAC1921 clears the measurement

registers, and consequently, the GUI Calculations/File IO tab is cleared. To

prevent the PAC1921 from entering Sleep, check the “SLEEP OVR” box in the

Main Configuration section.

PAC1921 Datasheet(PDF) 28 Page - Microchip Technology